2804391 has 12 divisors (see below), whose sum is σ = 4065568. Its totient is φ = 1862784.

The previous prime is 2804383. The next prime is 2804407. The reversal of 2804391 is 1934082.

It is not a de Polignac number, because 2804391 - 2³ = 2804383 is a prime.

It is a Duffinian number.

2804391 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2804311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3831 + ... + 4503.

2^2804391 is an apocalyptic number.

2804391 is a deficient number, since it is larger than the sum of its proper divisors (1261177).

2804391 is a wasteful number, since it uses less digits than its factorization.

2804391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142 (or 1139 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 2804391 is about 1674.6316012783. The cubic root of 2804391 is about 141.0196139909.

The spelling of 2804391 in words is "two million, eight hundred four thousand, three hundred ninety-one".